/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef __FREESTYLE_AVERAGE_AREA_GRID_DENSITY_PROVIDER_H__
#define __FREESTYLE_AVERAGE_AREA_GRID_DENSITY_PROVIDER_H__

/** \file
 * \ingroup freestyle
 * \brief Class to define a cell grid surrounding the projected image of a scene
 */

#include "GridDensityProvider.h"

namespace Freestyle {

class AverageAreaGridDensityProvider : public GridDensityProvider {
  // Disallow copying and assignment
  AverageAreaGridDensityProvider(const AverageAreaGridDensityProvider &other);
  AverageAreaGridDensityProvider &operator=(const AverageAreaGridDensityProvider &other);

 public:
  AverageAreaGridDensityProvider(OccluderSource &source,
                                 const real proscenium[4],
                                 real sizeFactor);
  AverageAreaGridDensityProvider(OccluderSource &source,
                                 const BBox<Vec3r> &bbox,
                                 const GridHelpers::Transform &transform,
                                 real sizeFactor);
  AverageAreaGridDensityProvider(OccluderSource &source, real sizeFactor);
  virtual ~AverageAreaGridDensityProvider();

 private:
  void initialize(const real proscenium[4], real sizeFactor);
};

class AverageAreaGridDensityProviderFactory : public GridDensityProviderFactory {
 public:
  AverageAreaGridDensityProviderFactory(real sizeFactor);
  ~AverageAreaGridDensityProviderFactory();

  AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource &source,
                                                      const real proscenium[4]);
  AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource &source,
                                                      const BBox<Vec3r> &bbox,
                                                      const GridHelpers::Transform &transform);
  AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource &source);

 protected:
  real sizeFactor;
};

} /* namespace Freestyle */

#endif  // __FREESTYLE_AVERAGE_AREA_GRID_DENSITY_PROVIDER_H__
